In vertebrates, it is now clearly demonstrated that the pineal gland is implicated in conveying
photoperiodic information via the daily pattern of melatonin secretion. Invertebrates, like …

Introduction: crustacean circadian biology 2.1. Rhythms and circadian phenomena 2.2.
Chronobiological systems in Crustacea 2.3. Pacemakers in crustacean circadian systems 3 …

Biogenic amines in crustaceans function mainly as neurotransmitters and neuro-modulators.
In addition, some biogenic amines serve also as neurohormones in the hemolymph …

Risk assessment of emerging pollutants requires the development of bioassays able to
detect and understand novel mechanisms of action. This study tested the hypothesis that the …

Molting is a phenomenon of shedding the old cuticle and re-generating the new one found
in crustaceans including shrimps and many other species of invertebrates. The molting cycle …

In malacostracan crustaceans, neuroendocrine centres are found in the eyestalk, brain,
suboesophageal ganglion and throughout the remainder of the central nervous system. The …

We investigated changes in serotonin (5-HT) and dopamine (DA) levels and in their
distribution patterns in the central nervous system (CNS) and ovary during the ovarian …

–The effect of photoperiod on growth of juvenile giant freshwater prawns, Macrobrachium
rosenbergii de Man, was tested. The prawns were divided into four groups and each group …

ABSTRACT The effect of 5-hydroxyptryptamine (5-HT) was tested in a population of X organ
neurosecretory cells in the eyestalk of the crayfish Procambarus clarkii. Tests were …

The content and regional distribution of 5-hydroxytryptamine (5-HT) in the crayfish eyestalk
was determined by high-performance liquid chromatography. Levels of the 5-HT precursors …